As a Thai-Hongkonger worked in Bangkok for several times, I can affirm that Morphy's place is located in a pretty convenient area - easy to go to the city centre, as well as the cool places near the riverside. Having said that, the condo where Morphy's place is situated is rather new and big.
I mainly used Grab as my means of transportation and most drivers experienced difficulties in finding the condo as it is rather new and located in a little unnamed lane on Charoen Rat Road (between Soi 3 and 5). You will need to either be able to speak Thai or ask the security guard to help talk to your Grab/taxi driver.
Morphy's place is located at the farthest building from the entrance of the condo. The walkway to the building is outdoor and it could be quite slippery when it's raining. It's better to wear sandals with better gripping abilities when it rains (you will need to pass through some water puddle in order to get out).
Although Morphy was not there in Bangkok, his friend, King, was very helpful and hospitable throughout the whole experience. Using Mandarine (Putonghua) for verbal communication (luckily my Mandarine is still functional), he took care of the check-in and check-out (King's friend also came to help with the check-out) smoothly. I needed washing powder in the middle of the week and he bought it over in no time. He also helped pay for part of the taxi ride from the airport first as I didn't have enough small Thai band notes. However, if you can't speak Mandarine, it may be a good idea for you to let Morphy know in advance.
Morphy's place is very clean and well-furnished. It has all the amenities as mentioned in the description, e.g. a washer, a smart TV, a hairdryer, and a wardrobe with a huge mirror. It is a bought private apartment among other service apartments in the same building.